/*
 * Copyright (c) 2010, Michael Hengler (developer (at) hengler (dot) de),
 * Nikolaus Moll (developer (at) miblounge (dot) net).
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the [QTPRJ] nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL [QTPRJ] BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package joodin.impl.widgets.internal;

import joodin.impl.util.StringComparator;

import org.jowidgets.common.widgets.controler.IPopupDetectionListener;
import org.jowidgets.spi.verify.IInputVerifier;
import org.jowidgets.spi.widgets.IComboBoxSpi;
import org.jowidgets.spi.widgets.IPopupMenuSpi;
import org.jowidgets.spi.widgets.setup.IComboBoxSetupSpi;

import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.data.Property.ValueChangeListener;
import com.vaadin.ui.ComboBox;

public class ComboBoxImpl extends AbstractInputControl implements IComboBoxSpi {

	private final IInputVerifier inputVerifier;
	private String oldText = "";
	private String[] elements;

	@SuppressWarnings("serial")
	public ComboBoxImpl(final Object parentUiReference, final IComboBoxSetupSpi setup) {
		super(new ComboBox());

		inputVerifier = setup.getInputVerifier();

		getUiReference().setReadOnly(false);
		getUiReference().setImmediate(true);

		getUiReference().addListener(new ValueChangeListener() {
			
			@Override
			public void valueChange(ValueChangeEvent event) {
				eventTextChanged();		
			}
		}); 
	}
	
	@Override
	public ComboBox getUiReference() {
		return (ComboBox) super.getUiReference();
	}

	@Override
	public void setEditable(final boolean editable) {
		getUiReference().setReadOnly(true);
	}

	@Override
	public String getText() {
		return (String) getUiReference().getValue();
	}

	@Override
	public void setText(final String text) {
		getUiReference().setCaption(text);
	}
	// TODO: eventTextChanged
	protected void eventTextChanged() {
		String currentText = getText();
		if(currentText == null){
			currentText = "";
		}
		int cursorPosition = currentText.length() - 1;
		for(int i = 0; i < currentText.length() && i < oldText.length() ; i++){
			if(currentText.charAt(currentText.length() - i - 1) == oldText.charAt(oldText.length() - i - 1)){
				cursorPosition = currentText.length() - i - 1;
			}
		}
		
		if(cursorPosition < 0){
			cursorPosition = 0;
		}
	
		final StringComparator comparator = new StringComparator(
			oldText,
			currentText,
			cursorPosition);

		if (inputVerifier.verify(currentText, comparator.getText(), comparator.getStart(), comparator.getEnd())) {
			oldText = currentText;

			// dispatch event 
			fireInputChanged(getUiReference());
		} else {
			this.setText(oldText);
		}
	}		
	

	@Override
	public int getSelectedIndex() {
		return getUiReference().getTabIndex();
	}

	@Override
	public void setSelectedIndex(final int index) {
		getUiReference().setTabIndex(index);
	}

	@Override
	public void setTooltipText(final String tooltipText) {
		getUiReference().setDescription(tooltipText);
	}

	@Override
	public String[] getElements() {
		// TODO: think about copy of array
		return elements;
	}

	@Override
	public void setElements(final String[] elements) {
		this.elements = elements;
		getUiReference().removeAllItems();
		for (final String element : elements) {
			getUiReference().addItem(element);
		}
	}

	@Override
	public IPopupMenuSpi createPopupMenu() {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public void addPopupDetectionListener(IPopupDetectionListener arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void removePopupDetectionListener(IPopupDetectionListener arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public Object getLayoutConstraints() {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public void setLayoutConstraints(Object arg0) {
		// TODO Auto-generated method stub
		
	}

}
